oj.uz

답안 #296043

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
296043 2020-09-10T08:20:29 Z Berted Election Campaign (JOI15_election_campaign) C++14
100 / 100
 300 ms 30968 KB 
#include <iostream>
#include <vector>
#define ll long long
#define pii pair<int, int>
#define ppi pair<pii, int>
#define fst first
#define snd second
using namespace std;

const int LG = 17;

struct BIT
{
	int N; ll A[100001];
	BIT() {}
	BIT(int size) {N = size;}
	void init(int size) {N = size;}
	void update(int x, ll val)
	{
		for (; x <= N; x += x & (-x)) {A[x] += val;}
	}
	ll query(int x)
	{
		ll ret = 0;
		for (; x; x -= x & (-x)) {ret += A[x];}
		return ret;
	}
};

int N, Q, h[100001], L[100001], R[100001], sps[100001][LG], idx = 1;
BIT D1, D2;
ll DP[100001];
vector<int> adj[100001];
vector<ppi> solve[100001];

void prep(int u, int p)
{
	h[u] = (p == -1) ? 0 : (h[p] + 1); L[u] = R[u] = idx++;
	sps[u][0] = p;
	for (int i = 1; i < LG; i++)
	{
		if (sps[u][i - 1] != -1) sps[u][i] = sps[sps[u][i - 1]][i - 1];
		else sps[u][i] = -1;
	}
	for (auto v : adj[u])
	{
		if (v != p)
		{
			prep(v, u);
			R[u] = max(R[u], R[v]);
		}
	}
}

inline int getLCA(int u, int v)
{
	if (h[u] > h[v]) {swap(u, v);}
	for (int i = 0; h[v] - h[u]; i++)
	{
		if ((h[v] - h[u]) & (1 << i)) {v = sps[v][i];}
	}
	if (u == v) {return u;}
	for (int i = LG - 1; i >= 0; i--)
	{
		if (sps[u][i] != sps[v][i]) {u = sps[u][i]; v = sps[v][i];}
	}
	return sps[u][0];
}

void DFS(int u, int p)
{
	ll childSum = 0;
	for (auto v : adj[u])
	{
		if (v != p) {DFS(v, u); childSum += DP[v];}
	}

	DP[u] = childSum;
	for (auto v : solve[u])
	{
		ll v1 = D1.query(L[v.fst.fst]) + D1.query(L[v.fst.snd]) - 2 * D1.query(L[u]);
		ll v2 = D2.query(L[v.fst.fst]) + D2.query(L[v.fst.snd]) - 2 * D2.query(L[u]);
		DP[u] = max(DP[u], v1 - v2 + childSum + v.snd);
	}

	D1.update(L[u], childSum);
	D1.update(R[u] + 1, -childSum);
	D2.update(L[u], DP[u]);
	D2.update(R[u] + 1, -DP[u]);
}

int main()
{
	ios :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> N; D1.init(N); D2.init(N);
	for (int i = 1; i < N; i++)
	{
		int u, v; cin >> u >> v;
		adj[u - 1].push_back(v - 1);
		adj[v - 1].push_back(u - 1);
	}
	prep(0, -1);
	cin >> Q;
	for (int i = 0; i < Q; i++)
	{
		int u, v, w; cin >> u >> v >> w; u--; v--;
		solve[getLCA(u, v)].push_back({{u, v}, w});
	}
	DFS(0, -1);
	cout << DP[0] << "\n";
	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5248 KB Output is correct
5 Correct 129 ms 19704 KB Output is correct
6 Correct 60 ms 27256 KB Output is correct
7 Correct 121 ms 24568 KB Output is correct
8 Correct 86 ms 19960 KB Output is correct
9 Correct 120 ms 23032 KB Output is correct
10 Correct 101 ms 19960 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5248 KB Output is correct
4 Correct 159 ms 30584 KB Output is correct
5 Correct 161 ms 30584 KB Output is correct
6 Correct 130 ms 30584 KB Output is correct
7 Correct 151 ms 30712 KB Output is correct
8 Correct 157 ms 30712 KB Output is correct
9 Correct 131 ms 30584 KB Output is correct
10 Correct 145 ms 30584 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5248 KB Output is correct
4 Correct 159 ms 30584 KB Output is correct
5 Correct 161 ms 30584 KB Output is correct
6 Correct 130 ms 30584 KB Output is correct
7 Correct 151 ms 30712 KB Output is correct
8 Correct 157 ms 30712 KB Output is correct
9 Correct 131 ms 30584 KB Output is correct
10 Correct 145 ms 30584 KB Output is correct
11 Correct 17 ms 6016 KB Output is correct
12 Correct 155 ms 30920 KB Output is correct
13 Correct 148 ms 30968 KB Output is correct
14 Correct 143 ms 30968 KB Output is correct
15 Correct 148 ms 30948 KB Output is correct
16 Correct 134 ms 30964 KB Output is correct
17 Correct 153 ms 30840 KB Output is correct
18 Correct 159 ms 30908 KB Output is correct
19 Correct 129 ms 30968 KB Output is correct
20 Correct 163 ms 30856 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 208 ms 22424 KB Output is correct
2 Correct 117 ms 30588 KB Output is correct
3 Correct 300 ms 27512 KB Output is correct
4 Correct 139 ms 22956 KB Output is correct
5 Correct 215 ms 27012 KB Output is correct
6 Correct 137 ms 22896 KB Output is correct
7 Correct 299 ms 26804 KB Output is correct
8 Correct 195 ms 22648 KB Output is correct
9 Correct 128 ms 30584 KB Output is correct
10 Correct 250 ms 25776 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5248 KB Output is correct
5 Correct 129 ms 19704 KB Output is correct
6 Correct 60 ms 27256 KB Output is correct
7 Correct 121 ms 24568 KB Output is correct
8 Correct 86 ms 19960 KB Output is correct
9 Correct 120 ms 23032 KB Output is correct
10 Correct 101 ms 19960 KB Output is correct
11 Correct 6 ms 5248 KB Output is correct
12 Correct 4 ms 5248 KB Output is correct
13 Correct 4 ms 5248 KB Output is correct
14 Correct 5 ms 5248 KB Output is correct
15 Correct 4 ms 5248 KB Output is correct
16 Correct 4 ms 5248 KB Output is correct
17 Correct 4 ms 5248 KB Output is correct
18 Correct 5 ms 5248 KB Output is correct
19 Correct 5 ms 5248 KB Output is correct
20 Correct 5 ms 5376 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 3 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5248 KB Output is correct
5 Correct 129 ms 19704 KB Output is correct
6 Correct 60 ms 27256 KB Output is correct
7 Correct 121 ms 24568 KB Output is correct
8 Correct 86 ms 19960 KB Output is correct
9 Correct 120 ms 23032 KB Output is correct
10 Correct 101 ms 19960 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 3 ms 5120 KB Output is correct
13 Correct 4 ms 5248 KB Output is correct
14 Correct 159 ms 30584 KB Output is correct
15 Correct 161 ms 30584 KB Output is correct
16 Correct 130 ms 30584 KB Output is correct
17 Correct 151 ms 30712 KB Output is correct
18 Correct 157 ms 30712 KB Output is correct
19 Correct 131 ms 30584 KB Output is correct
20 Correct 145 ms 30584 KB Output is correct
21 Correct 17 ms 6016 KB Output is correct
22 Correct 155 ms 30920 KB Output is correct
23 Correct 148 ms 30968 KB Output is correct
24 Correct 143 ms 30968 KB Output is correct
25 Correct 148 ms 30948 KB Output is correct
26 Correct 134 ms 30964 KB Output is correct
27 Correct 153 ms 30840 KB Output is correct
28 Correct 159 ms 30908 KB Output is correct
29 Correct 129 ms 30968 KB Output is correct
30 Correct 163 ms 30856 KB Output is correct
31 Correct 208 ms 22424 KB Output is correct
32 Correct 117 ms 30588 KB Output is correct
33 Correct 300 ms 27512 KB Output is correct
34 Correct 139 ms 22956 KB Output is correct
35 Correct 215 ms 27012 KB Output is correct
36 Correct 137 ms 22896 KB Output is correct
37 Correct 299 ms 26804 KB Output is correct
38 Correct 195 ms 22648 KB Output is correct
39 Correct 128 ms 30584 KB Output is correct
40 Correct 250 ms 25776 KB Output is correct
41 Correct 6 ms 5248 KB Output is correct
42 Correct 4 ms 5248 KB Output is correct
43 Correct 4 ms 5248 KB Output is correct
44 Correct 5 ms 5248 KB Output is correct
45 Correct 4 ms 5248 KB Output is correct
46 Correct 4 ms 5248 KB Output is correct
47 Correct 4 ms 5248 KB Output is correct
48 Correct 5 ms 5248 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 5 ms 5376 KB Output is correct
51 Correct 211 ms 23004 KB Output is correct
52 Correct 154 ms 30840 KB Output is correct
53 Correct 267 ms 26196 KB Output is correct
54 Correct 142 ms 23092 KB Output is correct
55 Correct 198 ms 22832 KB Output is correct
56 Correct 149 ms 30968 KB Output is correct
57 Correct 216 ms 26900 KB Output is correct
58 Correct 139 ms 23084 KB Output is correct
59 Correct 206 ms 23160 KB Output is correct
60 Correct 156 ms 30896 KB Output is correct
61 Correct 239 ms 27028 KB Output is correct
62 Correct 141 ms 22860 KB Output is correct
63 Correct 204 ms 22624 KB Output is correct
64 Correct 159 ms 30944 KB Output is correct
65 Correct 268 ms 26916 KB Output is correct
66 Correct 131 ms 23220 KB Output is correct
67 Correct 206 ms 22740 KB Output is correct
68 Correct 136 ms 30840 KB Output is correct
69 Correct 213 ms 25720 KB Output is correct
70 Correct 132 ms 23260 KB Output is correct